<html>
    <head lang="utf-8" ></head>
    <header></header>
    {% if  msg %}
    <p style="color: green;">{{msg}}</p>
    {% endif %}
    <body>
        <h1>测试首页</h1>
        <br>
        <input type="button"    value="添加日程">
        <a href="/add_day">添加</a>
    
    </body>
    <script>
    </script>
</html>